One drawing, Umedecendo a pele do sapo (Moistening the Frog's Skin), shows a group of people with intertwined tongues above the body of a frog; they are keeping it wet, since the frog is accustomed to living near water.

Researchers at the State University of New York at Buffalo and the Roswell Park Cancer Institute in Buffalo compared 51 non-Hispanic white men with tongue cancer and 54 non-Hispanic white men without tongue cancer.

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